DOI: 10.1175/JCLI-D-18-0304.1
Scopus记录号: 2-s2.0-85059613764
论文题名: North Atlantic summertime Anticyclonic Rossby wave breaking: Climatology, impacts, and connections to the Pacific decadal oscillation
作者: Zavadoff B.L. ; Kirtman B.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 2 起始页码: 485
结束页码: 500
语种: 英语
英文关键词: Climatology
; Pacific decadal oscillation
; Rossby waves
; Synoptic climatology
; Wave breaking
Scopus关键词: Atmospheric pressure
; Climatology
; Liquid waves
; Surface waters
; Tropics
; Irreversible deformation
; Medium range forecast
; North Atlantic oscillations
; Pacific decadal oscillation
; Rossby wave
; Sea surface temperature anomalies
; Synoptic climatology
; Wavebreaking
; Oceanography
; anticyclone
; North Atlantic Oscillation
; Pacific Decadal Oscillation
; Rossby wave
; summer
; synoptic meteorology
; wave breaking
英文摘要: Anticyclonic Rossby wave breaking (RWB) is characterized by the rapid and irreversible deformation of potential vorticity (PV) contours on isentropic surfaces manifesting as a pair of meridionally elongated highand low-PV tongues that transport extratropical stratospheric air equatorward and tropical tropospheric air poleward, respectively. Previous studies have noted connections between different types of RWB and the modulation of localized atmospheric phenomena such as the North Atlantic Oscillation (NAO) and tropical cyclogenesis. Despite being the season in which anticyclonic RWB events are most prevalent, no work has focused solely on the frequency, genesis, or variability of the synoptic environment surrounding the equatorward branch of anticyclonicRWBevents during the North Atlantic summertime, providing motivation for this study. Using 58 years (1960-2017) of NCEP-NCAR reanalysis data, a comprehensive spatiotemporal climatology of North Atlantic equatorward anticyclonic RWB identified on the 350-K isentropic surface is developed and the synoptic environment surrounding these events fromtime- and high-PV-tongue centroid-relative perspectives is investigated. Consistent with previous studies, composites suggest that high-PV tongues associated with equatorward anticyclonic RWB introduce anomalously dry, stable extratropical air into the tropical environment, subsequently inhibiting convection there. Additionally, a connection between atmospheric responses to Pacific decadal oscillation (PDO) sea surface temperature (SST) anomalies and the intrabasin frequency of anticyclonic RWB events is uncovered and explored. Results from this study may aid short- to medium-range forecasts of North Atlantic tropical convection, with applications extending into the field of tropical cyclogenesis forecasting. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117255
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Zavadoff B.L.,Kirtman B.P.. North Atlantic summertime Anticyclonic Rossby wave breaking: Climatology, impacts, and connections to the Pacific decadal oscillation[J]. Journal of Climate,2019-01-01,32(2)